Year	% female
1971	45.77309
1972	52.60718
1977	54.79778
1978	54.51027
1979	54.41462
1980	54.71157
1981	58.61349
1982	59.4332
1983	57.26277
1984	53.5021
1985	53.53827
1986	53.39045
1987	52.89068
1988	50.57292
1989	53.13875
1990	52.09441
1991	53.34493
1992	54.30477
1993	53.74523
2002	52.87205
2003	48.94347
2004	51.44217
2005	50.14742
2007	49.04288
2008	47.33339
2009	49.68725
2010	50.26957
2013	48.53586
2014	48.77773
2015	48.75927
2016	49.72237
2017	50.07924
2018	49.77559